My sig has been changing back and forth. I first reported this on the 25th of Feb. and then again reported it today. I'm sure it has switched back and forth more than those dates, but I just hate to keep reporting the same thing over and over ever time it happens. So if something keeps happening I at least have spaced out the number of times I have reported it.

Happened to post #2 in this thread just now. I updated, saved, and saw the new version. Then a little later the previous one. No big deal, I just saved it once more, and the latest version is now visible. But since you asked:Fed stats - with most weeks in top-2, 3, 5 and 10

This issue is still occurring.
About 3-4 days ago, it happened to me in post #1 and post #2 in this thread. Have had somewhat regular updates(25+ edits I think) to both posts and this has happened only once, which is is a huge improvement by my experience. (Last time I had to make regular edits-in January, this used to happen every 3-4 edits.)